 All right, I'll finish. Now we... Open the vacuum cleaner. And we have one porcelain trap filled with assorted dust. Dust? And this dust is going under the microscope right now. Why? Going to tell us where Eddie Tyler's been during the past few weeks. How the devil can dust do that, Nick? Use your head, Walt. Yeah, but there's dust in the air everywhere. But it's not all the same kind of dust. Find particular kinds of dust in particular localities.